Zobrazeno 1 - 10
of 26
pro vyhledávání: '"Baushev, Anton N."'
Autor:
Baushev, Anton N.
We find an analytical solution for the minimal matter density of a void, its central density. It turns out that the voids are not so empty: most of the voids have the central underdensity $\Delta_c \sim -50\%$ (which means that the matter density in
Externí odkaz:
http://arxiv.org/abs/2409.02780
Autor:
Baushev, Anton N.
We offer an exact analytical equation for the void central region. We show that the central density is solely determined by the amplitude of the initial perturbation. Our results suggest that N-body simulations somewhat overestimate the emptiness of
Externí odkaz:
http://arxiv.org/abs/2104.01359
Autor:
Baushev, Anton N.
Publikováno v:
Astronomy Reports, Volume 64, Issue 12, p.1005-1011, (2020)
Being generated, the relic neutrino background contained equal fractions of electron $\nu_e$, muon $\nu_\mu$, and taon $\nu_\tau$ neutrinos. We show that the gravitational field of our Galaxy and other nearby cosmic objects changes this composition n
Externí odkaz:
http://arxiv.org/abs/2101.11405
Autor:
Baushev, Anton N.
Publikováno v:
Phys. Rev. D 102, 083529 (2020)
The gravitational field of a massive object (for instance, of a galaxy group or cluster) disturbs the Hubble stream, decreasing its speed. Dependence $v(r_0)$ of the radial velocity of the stream from the present-day radius $r_0$ can be directly obse
Externí odkaz:
http://arxiv.org/abs/2004.01427
Autor:
Baushev, Anton N.
The gravitational field of a galaxy group or cluster slows down the Hubble stream and turns it speed to zero at some radius $R_0$. We offer an exact analytical relation between $R_0$ and the mass of the group.
Comment: 4 pages, 2 figures, accept
Comment: 4 pages, 2 figures, accept
Externí odkaz:
http://arxiv.org/abs/1907.08716
Autor:
Baushev, Anton N., Barkov, Maxim V.
We consider the behavior of spherically symmetric Einasto halos composed of gravitating particles in the Fokker-Planck approximation. This approach allows us to consider the undesirable influence of close encounters in the N-body simulations more ade
Externí odkaz:
http://arxiv.org/abs/1705.05302
Autor:
Baushev, Anton N.
We suggest a possible mechanism of ultra diffuse galaxy formation: the UDGs may occur as a result of a central collision of galaxies. If the galaxies are young and contain a lot of gas, the collision may kick all the gas off the systems and thus stro
Externí odkaz:
http://arxiv.org/abs/1608.04356
Autor:
Baushev, Anton N.
A very general cosmological consideration suggests that, along with galactic dark matter halos, much smaller dark matter structures may exist. These structures are usually called 'clumps', and their mass extends to $10^{-6} M_\odot$ or even lower. Th
Externí odkaz:
http://arxiv.org/abs/1506.08609
Autor:
Baushev, Anton N.
Publikováno v:
Astroparticle Physics, 2015, Volume 62, p. 47-53
We consider the reasons why a cuspy NFW-like profile persistently occurs in N-body simulations, in contradiction to some astronomical observations. The routine method of testing the convergence of N-body simulations (in particular, the negligibility
Externí odkaz:
http://arxiv.org/abs/1312.0314
Autor:
Baushev, Anton N.
Publikováno v:
A&A 569, A114 (2014)
We show that moderate energy relaxation in the formation of dark matter halos invariably leads to profiles that match those observed in the central regions of galaxies. The density profile of the central region is universal and insensitive to either
Externí odkaz:
http://arxiv.org/abs/1309.5162